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yParenfed Dec. 9,1919.

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I. DE KONING. GRINDING MACIHNE. APPLICATION FILED FEB.25. 1918:

Patented Dee. 9, 1919.,

J. DE KONING. GRINDING' MACHINE. APPLICATION FILED FEB. 251-19I in, 324,491 Patented Dec. 9,1919.-

4 SHEETS-SHEET 3- @LVI/humm J 27 Jam/MM MO Demme? w .@wcywfn/,m

J. DE KONING. GBINDING MACHINE. APPLICATION FILED FEB. 2s. I9Is.

Patented Deo. 9, 1919.

4 SHEETS-SHEET 4.

"Illu UNrTED' srnrnsgrgrnnr onirica.

JACOB KONING, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO GRAND RAP-IDS i GRINDIN G MACHINE COMPANY, 0F GRAND RAPIDS, MICHIGAN, CORPORA- 'rIoN or MICHIGAN.

GRiNmNG-MAGHIEE.

Patented Dee. 9, 191e.

Application mea February 25, 191s. seriai No. eiaooe.

ing of the movable work-holder or drill- 'holder or drill lip-rest carried thereon 'by machine;

the grinding wheel and further, to provide a wheel-dresser for resurfacing the grinding wheel in combination with said means; and further, to provide an improved rock bearing wherein the drill-holder may rock, and means for nicely adjusting and securely holding such drill-holder in rocked position; andfurther, to provide an improved lip-rest or stop for positioning the drill,

'while being ground, against rotation; and

further, to'provide improved means for securely holding such a lip-rest in adjusted positio K These and any other objects appearing hereinafter are attained by, and the invention `finds preferable embodiment in, the

structure hereinafter described and illus-v trated by the accompanyingdrawings, in which n Figure 1 is a side view of a drill grinding -F ig. 2 is a section of a portion thereof taken on a plane corresponding to line 2 2 of Fig. l;

Figa?, is a nview in perspective of the drillholder, the supporting part thereof being partly broken away;

Fig. 4 is an end view of the drill-holder;

Fig. 5 is a top plan view of a portion .of the same;

Fig. 6 is a sideIv-iew of said "port/ion;A

Fig. 7 is a view in perspective of a wheeldresser, for resurfacing the grinding wheel, and a sto for limiting the movement of the drill-hol er;

Fig. 8 is a side view ofthe same Fig. 9 is a side view of a modified construction ofsuch a stop andy wheel-dresser;

andl

Fig. 10 is a fragmentarytop plan View of the same.. 4l'

In the embodiment of the invention chosen for illustrationby the Adrawings and for detailed description in the body of this` speciication, the drill grinding machine has a suitable frame 1 on which is journaled a 1grinding wheel 2. A drill-holder or Workolder, (indicated generally 3) comprises a member Lland a supporting block 5 on whose inclined spindle 6 the member 4, is swingable andl which block is slidable horizontally on the frame as in a split slide bearj ing indicated at T in which it may be adjustably clamped as by a screw 8 turnable by the handle 9. This particular type yof grinding machine illustrated. in the drawings is adapted to diameters without t e necessity of :moving the axis' 6 on which the work-holder swings.

The swingable member 4- has concentric arcuate bearings, one, 10, of which is concave and the other, 11, isconveX as particurind drills of d i'erent larly vshown in Fig. 2. The drill-holder or work-holder also comprises a member -12 provided with a, ll-shaped trough 13 in which the drill 14 or work is held by hand whilel being ground.v A stop 15 adjustable to drills, etc., of different lengths, as lby the screws 16, 17 holds the work against the grinding wheel. The member 12has the Yconvex-faced body portion 18 rockable in the bearing 10 and the relatively movable concave-faced clamp portion 19 rockable on the bearing 11 with the lood portion 18. These portions are connected y a bolt 2O passing through a slot 21 in the member Landi threaded for the nuts 22 whereby the tight ness of the rock bearing maybe adjusted. The member 12 is rocked to. a nicely adjusted position and securely held in such ad- -j ustment by a screw axially transverse to the axis of said rocking. As shown, -this'screw' .23 is externally threaded at 24; on the member 4 and is provided with internal threads of a 2 pitch di'erent from its` eXternal threads, in which internal threads turns the screw 25 non-rotatably connected at 26 to the bolt 20.,

The member 12 lof the work-holder is rovided on its end adjacent the grinding w eel with a drill lip-rest 27 against whose edge `.28 a flute ofthe drill 14 lying in the trough is turned by hand toproper y position'the drill for grinding. This lip-rest is slidable 11i longitudinally in a slide bearing `having sides 29 30 angularly disposed toward eachy other. This lip-rest has its opposite edgeslongitudinally slidable mounting of the lipl rest, it may', ifnicked or marred at a point on its edge, be slid up or down in said bear- 1 'ing to present a new point of contact for the flute, and without otherwise adjusting -the lip-rest byv reversing the same in any of the ways above mentioned.v It will be seen that the usefulness of the lip-rest may be greatly prolonged by reason of these various adjustments. The lip-rest is thus slidably held in the bearing by headed threaded bolts 32 passing through slots 33 in the lip-rest elongated in thev direction of its sliding movement, the bolts extending through the member 12 in a direction angular to the sides 29,

of the bearing. `Nuts 3401i these bolts draw and removably clamp the lip-rest in thel internal corner formed by the meeting of the sides of said bearing.

To reventvthe marri-ng or grinding of the end o the member' 12, and particularly of the lip-rest by the.- careless or accidental moving of the drill-holder on the horizontal v bearing 7 into contact with the wheel, a sto is provided to limit-'such movement. Pre

'erably this stop -is of the form shown at 35,

v and. on it is adapted to abut and rock with lthe swinging'movemem of the drill-holder,

the 'member- 36 carried by the drill-holder and having anI arcuate face 37 engagingsaid stop. A wheel-dresser 38 swingably mounted at 39 on the frame axially parallel with the'axis of the wheel, carries a dressing tool, as the diamond point 40 which may be swung back and forth across the grinding surface of the wheel to resurface the same. As the wheels surface is cut away, the

.wheel-dresser mray be moved axially, as by the screw 41. h

e vstop 35 is movable in connection with the axial movement .of the wheel-dresser, (both being carried on the spindle 42), the wheel-dresser abutting against the stop as shown in Fig. \8. The result is that as the grinding face of the wheel is cut down, the stop retreats and always occupies Athe same position relatively to said face, so that the lip-rest or the drill- .l holder .itself is always limited inits movement toward the wheel tothe same position relatively'to said face, .no matter to what degree the wheel iscut down by the dressing process.

' A modified form ofthe stopy and wheeldresser is shown in Figs.`9 and 10. In these views, the stop 43 carried by the block 5 slidable horizontallyton the xed stud 44 insane? engage the collar 45 in whose annular groove the arm 46 of the wheel-dresser is swingably mounted. As the wheel-dresser-is moved axially along the stud, as by the nut 47 threaded thereon, the stop 43 limits the movement of the drill-holder toward the wheel to a certain position, no matter to what degree the wheel may' be dressed down. I

It will be seen that the wheel-dresser not only dresses the grinding surface of the wheel, but independently of its dressing or cutting operation acts as a means for positioning the stop relatively to the wheels grinding surface. l

The invention being intended to be pointed out by the claims severally, isl not to be limited to or by details of construction shown or described.

What is claimed is:

1. In a machine of the character described; a frame; a grinding wheel journaled thereon; a drill-holder swingable on the frame and movable toward and away from the wheel, and having a drill lip-rest and adapted to hold in position to beoperated on drills of different same position of its swingable axis; a stop intermediate the frame and the`drill-holder adapted to limitthemovement of the drillholder toward the wheel.

2. In a machine of the character de,- scribed; a frame havin swingable on the frame and movable toward and away from the wheel, and having a drill lip-rest; an arcuate-faced member carried by the drill-holder and adapted toabut and lrock on Said stop to limit the movement of the drill-holder toward the wheel.

3. In a grinding machine; a frame; a

grinding wheel journaled thereon; a workholder movable toward wheels mounted on the frame and, movable in the direction of the wheels axis; a stop intermediate the frame and movable in connection with the wheeldressers said movement and adapted to' limit the movement of 'the `work-holder to- Award the' wheel to the same. position relatively to its grinding surface whatever ma be the-position of said grinding surface re atively to the frame.

4. In a grinding machine; a frame; a

grinding wheel journaled-thereon; a workholder s'wingable on theframe and movable toward andaway from the wheels grinding surface; awheel-dresser swingably mounte on the frame and axiallyl movable in the direction ofthe wheels axis; a stop inter-4 mediate the frame and the'work-holder and movable in connection with the ,wheeldressers axial movement; an arcuate-faced member carried by the work-holder and a stop;'a grinding` wheel Journaled on the` rame; a drill-holder the Work-holder and diameters in the and away 'from' the" grinding surface; a wheel-dresser" means? adapted to abut and rock on said stop; the' stop being adapted, by its said axial movement with the wheel-dresser and by the abutting of said member thereon, to limit the movement of the work-holder toward the wheel to the same position relatively to its grinding surface whatever may be the position of said grinding surface 'relatively to the frame.

5. In a machine of Jthe character described; a frame; a grinding wheel journaled thereon; a drill-holder lswingable on the frame and comprising a member having a rock bearing and also comprisin a mem-v ber carried by the first-mentione member and rockable in said bearing; means connected to the second-mentioned member for g as .nected to thesecond-mentio'ne tightening said bearing means 'connected to sa1d first-mentioned means and adapted t0.

adjustably moveand hold the s econd-meny tioned member in rocked position.

V6. In a machine of the character de' scribed; a frame; a grinding wheel journaled thereon; a drill-holder swingable on the frame and comprising a member having' arcuate bearings concentrically concave and convex respectlvely, and also comprising a- Y member carried by the first-mentioned member and having relatively adjustable yportions,one of which rocks in the concave and the other in the convex bea'rln means conadjustably holding said portions interrelatively; means connected to. said first-mentioned-means/ and adapted 't0 adjustably move and hold the secon mentioned member in rocked position.

7. In a machiner of-v the character de scribed; -aframe; a grinding "wheel journaled thereon; va drill-holder swingable on the frame and comprising a member havin arcuate bearings concentrically concavean convex respectlvely, and'also comprising a member c rried by the first-mentioned meinber and rh; threaded in the first-.mentioned member; a screwv of' di'erent pitch threaded in the first entioned screw and o erativelv connected non-rotatably with t e second-mentioned member for adjustably moving and holding the second-mentioned member in rocked position.

8. In a. machine of naled thereon;

member Jfor f kable in said bearings; a screw.

.the .character de, scribed; a. frame; .a grinding vwheel ]our 9. In a machine of the character described; a frame; a grinding wheel joura drill-holder lmovable` toward and away from the wheels grinding surface and having a slide'bearing; areversible drill lip-rest removablyslidable in l said bearing and having ed esboth of which -are fixedly parallel withl t e lip-rests vSlid-v able movement and either of which in op erative position. is adapted to engage a drill flute; means for securing the lip-rest in adjusted position.

10. In a machinel ofthe character described; a frame; a grindin ywheel journaled thereon; a drill-ho der movable toward and'away from' the Wheels grinding surface "and having avfslide'bearin with lip-rest having a slot elongated in the direcj angularly disposed sides; a reversib e drill tion of said bearing; -a headed threaded bolt extending through said slot and extending through the dri l-holder angularly to 'the sides of the bearing; a nut onfthe bolt'for Y drawin th'eilip-rest against said 4sidesl inadjuste position.

1l. In a 'rinding machine; 'a frame; a

' grinding w eel journaled f thereon; al drillholder movable 'toward and away )from thel wheels grinding surface and having a drill lip-rest; a movable sto intermediate the limit the movement of the -work-holder towardthe wheel; means for positioning the top relatively to the wheels grinding surace. 12.V In a grinding machine; a A grinding wheel jour-naled thereon; a wheelressermounted on the frame and movable- -toward the wheels grinding surface; a stop member movable in connection with the wheel-dressers said movement, and adapted 13. In a grinding Amachine; a frame; a

.frame and the drill-hol er and adapted to frame; a

to be maintained in operative position'. durling the operation -o' the vvheel-dresscnj.,

l 05 grinding wheel journaled thereon; a work- 3 holder movable toward and away from the j I wheels grinding surface; a wheel dresser mounted on the frame and movable ,toward the wheels grinding surface; a sto `intermediate the frame and the work-hol erV and movable in connection` with the wheelf dressers-Y said movement and ada ted. to'

limit the movement of the wor -holder toward the wheel to the same position rela- L tively to its grinding surface whatever may be the position of said grinding surface relatively to the frame. Y Y

. In testimon vwhereor` I have hereunto set my hand at rand Rapids, Michigan, this 22nd day`of February, 1918. l Y' JACOBDE KONING, 

